3121000013203 has 4 divisors (see below), whose sum is σ = 3123665257768. Its totient is φ = 3118334768640.

The previous prime is 3121000013177. The next prime is 3121000013213. The reversal of 3121000013203 is 3023100001213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3121000013203 - 2⁵ = 3121000013171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121000013213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1332620526 + ... + 1332622867.

It is an arithmetic number, because the mean of its divisors is an integer number (780916314442).

Almost surely, 2^{3121000013203} is an apocalyptic number.

3121000013203 is a deficient number, since it is larger than the sum of its proper divisors (2665244565).

3121000013203 is a wasteful number, since it uses less digits than its factorization.

3121000013203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665244564.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 3121000013203 its reverse (3023100001213), we get a palindrome (6144100014416).

The spelling of 3121000013203 in words is "three trillion, one hundred twenty-one billion, thirteen thousand, two hundred three".